Blue Hour palette
Tranquil Meadow
From #004376 ink through #036ab5, #2f86d3, #5195d8 to #6db2f6 light, Tranquil Meadow is a tetradic progression that holds together at any size. Use it for book covers that read at thumbnail size. The darkest and lightest stops clear AA as a text pair.
skybluehourfive-stophigh-contrast
#004376
#036ab5
#2f86d3
#5195d8
#6db2f6
The generator opens with #004376 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.